Improvement in hollow augers



GIF. ALMY.

Hollow Augers.

No. 141,]45. PatentedAugust12,1873.

UNITED STATES PATENT OFFICE GEORGE F. ALMY, OF DELPHOS, ASSIGNOB TOHIMSELF AND H. M. GLARK, OF TOLEDO, OHIO.

iMPROVEMENT IN HOLLOW AUGERS.

Speciiication forming part of Letters Patent No. 1 119745, dated August12, 1873; application filed July 10, 1873.

' To all whom 't may conccw:

Be it known that I, GEORGE F. ALMY, of Delphos, in the county of VanWert and State of Ohio, have invented certain new and usefulImprovements in Hollow Augers and I do hereby declare that the followingis a full, clear, and exact description thereof, reference being had tothe accompanying drawings, and to the letters of reference markedtherecn, which form a part of this specification.

The nature of my invention consists in the construction and arrangernentof a hollow auger for making oval tenons, as will be heroinafter morefully set forth.

In order to enable others skilled in the art to which my inventionappertains to make and use the same, I will now proceed to describe itsconstruction and operation, referring to the annexed drawing, in which-Figure 1 represents a longitudinal section, and Fig. 2 a bottom View.

One of the greatest difficulties in making light carriage and buggywheels has been to get a tight spoke-and-felly joint, the reason beingthat, if a round tenon fits very tight in a round hole, the driving inwill often split the felly. This is the casewith the beststraight-grained tinber.

The object of my invention is to overcome this difficulty byconstructing an anger that will make an oval tenon, so that thewedgingpressure of the tenon will be upon the ends instead of upon thesides of the Wood, thereby preventing the swelling and splitting of thefelly. v

The anger proper is slotted into four sections, A A, in such a mannerthat each section is made to act as a spring. On the outer end of eachof these spring-sections is attached a guide, B, with adjustable knifeor cutter O, constructed in any of the known and usual ways to cuttenons. On the outside of each section A is a small lug or bearing, a,and upon the outside of these bearings is placed a suitably shaped ring,D, which is made oval on its inner edge. For cutting an oval tenon alever, Gr, is inserted in a hole, x, on the outside edge ot' the ring D,and this lever is allowed to rest on the spoke next to the one beingoperated upon. hen the anger proper then is rotated and the ring heldstationary by the lever just mentioned, the sections A A willnecessarily conforn to the oval shape of the inside of the ring D, aseach section is made in the proper shape to press outward. The knives orcutters being attached to the springsections A A, they will neeessarilycut an oval tenon. y

This instrument is intended more particularly for hand-work, but isequally applicable to power machines. i

Having thus fully described my invcntion, what I claim as new, anddesire to secure by Letters Patent, is-

A hollow anger cut in a series of spring-seotions A A, each sectionhaving a suitable knife or cutter, in conbination with a ring, D, placedaround the outside of the sections, and its inner edge made in ovalform, all substantially as and for the purposes herein set forth.

In testinony that I claim the foregoing as niy own I affix ny signaturein presence of two witnesses.

G. F. ALMY. Witnesses:

HENnY J. TRAME, L. S,.S. RrsLEY.

